Apparatus for promoting combustion.



PATBNTED NOV. 28, 1905.

W. E. HBRRIGK. APPARATUS FOR PROMOTING COMBUSTION.

APPLICATION FILED JUNE 25, 1904.

UNITED STATES PATENT oEEIoE.

VVILBIIR F. HERRIOK, OF HAWORTH, NEW JERSEY, ASSIGNOR TO HERRIOKCOMPLETE COMBUSTION COMPANY. OF NEW YORK, N. Y., A CORPORA- TION OFMAINE.

APPARATUS FOR PROMOTING COMBUSTION.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed June 25, 1904:- Serial No. 214,098.

To all whom it may concern: v

Be it known that I, WILBUR F. HERRIGK, a

citizen of the United States of America, and a resident of Haworth,county of Bergen, State of New Jersey, have invented certain new anduseful Improvements in Apparatus for Promoting Combustion, of which thefollowing is a specification, reference being had to theaccompanyingdrawings, forming a part thereof.

My invention relates to improvements in apparatus for promotingcombustion, and particularly to means for introducing atmospheric 7 airinto the combustion-chamber of a furnace, stove, or the like and mixingthe same with} the hot products of combustion. It is well understood, ofcourse, that with the ash-pit and furnace doors closed there is atendency to a Vacuum in the combustion-chamber. This 5 tendency tovacuum is utilized for the purpose of drawing in air to promotecombustion.

In order that air thus drawn in may be utilized to the best advantage,it is necessary to raise its temperature to a high degree. One reasonfor this is that carbon monoxid or the products of imperfect combustionrequire that the air shall beat a high degree of temperature before theoxygen thereof is available for combination therewith to produce carbondioxid. In the formation of carbon dioxid more than three times thenumber of heat units are liberated than in the formation of carbonmonoxid, and hence the conversion of all the .carbon-monoxid to carbondioxid is desirable. v v Incarrying outmy-invention I provide a aformof. injector through which the currents of air induced by the loweringof pressure in the combustion-chamber must pass, and I utilize theinductive force of the current of air to carry back a certain portion ofthe products of combustion passing from the furnace,

7 to a stove, range, furnace, heater, or the like between the same andthe smoke-pipe.

I will now proceed to describe such a device embodying my invention andwill then point out the novel features in claims.

In the drawings, Figure 1 is a view in side elevation of a stove havinga draft-collar embodying my invention employed in connection therewith,a portion of the stove being broken away and the draft-collar beingshown in central vertical longitudinal section. Fig. 2 is a view incentral horizontal section through the draft-collar on a scale largerthan that employed for Fig. 1. Fig. 3 is an end view of same. Fig. 4 isa top view thereof.

The present device comprises a draft-collar consisting of a tubularshell 1, arranged at one end 2 to fit the nipple 3 with which stoves,ranges, furnaces, heaters, and the like are usually provided and at theother end 4 arranged to receive the end of the smoke-pipe 5. The tubularshell forms a support for the injector, which includes an air-passage 6,a passage for products of combustion 7 and a mixing and heating chamber8. The air-passage 6 receives atmospheric air through the inlet-opening9, which opens directly to atmosphere, while the passage 7 receivesprodnets of combustion through the flared mouth 10, which opensdirectlyiinto the combustionchamber. The mixed gases are delivered intothe combustion chamber through perforations 11.

It will be noticed that the injector extends transversely across thedraft-collar; but by examination of Figs. 2 and 3 it will be seen thatin cross-section the device is quite narrow, so as to but little opposethe passage of gases to the smoke-pipe, while still exposed to the heatthereof.

In operation the firedoor will be kept closed and the ash-pit door willalso be closed,

.or openedbut a little way, thereby creating a tendency to vacuum in thecombustionchamber, as is well understood. This tendency to vacuum willcreate adraft, drawing air in a continuous stream through the passage 6into the injector. The inductive force at the nozzle 12 willdraw inproducts of combustion through the passage 7, the said prodnets, ofcombustion and air thus mixing in the mixing-chamber 8, whereby thetemperature of the air will be raised to a degree sufiicient to make theoxygen thereof available. The products of combustion and heated air thusmixed will be discharged through the perforations 11 into thecombustion-chamber above the fuel, supplying the same with sufficienthot air to promote combustion therein, converting the carbon monoxidinto carbon dioxid and obtaining the greatest efficiency from theburning fuel.

A draft-collar of this description may constitute an article ofmanufacture which may be readily applied to existing stoves, ranges,furnaces, heaters, or the like with a minimum of trouble and expense.The device itself is extremely simple and easy to manufacture and may beapplied by merely interposing it between the end of the smoke-pipe andthe nipple or ring to which the smoke-pipe end is ordinarily attached,as clearly illustrated in the drawings.

The passage of air through the device may be controlled by any suitablemeans, as by the use of a sliding gate 13, which may be employed forclosing or partially closing the inlet 9.

What I claim is 1. In an apparatus for promoting combustion, thecombination with a combustion-chamber, of a draft-collar through whichthe products of combustion may pass, said draft-collar containing amixing and heating chamber, and means for admitting air and a portion ofthe products of combustion thereto, and for delivering the mixed gasesinto the combustion-chamber above the fuel.

2. In an apparatus for promoting combustion, the combination with acombustion-chamber, of a draftcollar through which the products ofcombustion may pass, said draft-collar supporting an injector providedwith an air-inlet, an inlet for products of combustion and a mixing andheating chamber, the device including a nozzle for assisting theinduction of the products of combustion by the air-currents flowingtherethrough, and a passage for discharging the mixed gases into thesaid combustion-chamber above the fuel.

3. In an apparatus for promoting combustion, the combination with thecombustionchamber of a heater, stove or the like, of a draft-collarlocated in open communication with the said combustion-chamber andbetween same and the smoke-pipe, said draftcollar supporting an injectorcomprising an air-inlet, an inlet for products of combustion, a mixingand heating chamber and a discharge for the mixed gases arranged todischarge s anie into said combustion-chamber above the 4. In anapparatus for promoting combustion, the combination with a stove, heateror the like, of a draft-collar arranged to be connected at the outlet ofthe combustion-chamber, and through which the products of combustionfrom the combustion-chamber may pass, said draft-collar containing aninjector having an air-inlet, an inlet for products of combustion, amixing and heating chamber and a passage leading therefrom to a point inproximity to the combustion-chamber, and having an outlet arranged todeliver mixed gases directly into the said combustion-chamber above thefuel.

5. In an apparatus for promoting combustion,the combination with acombustion-chamber, of a draft-collar through which the products ofcombustion may pass, said draft-collar containing a mixing and heatingchamber, and means for admitting air and a portion of the products ofcombustion thereto, and for delivering the mixed gases into thecombustion-chamber above the fuel, and means for regulating andcontrolling the passage of air to the mixing-chamber.

6. As an article of manufacture, a draftcollar arranged to be connectedwith the combustion-chamber of a stove, heater or the like, and throughwhich the products of combustion from the combustion-chamber will pass,said draft-collar supporting an injector comprising an air-inlet, aninlet for products of combustion, a mixing and heating chamber, and adischarge for the mixed gases arranged to deliver same into the saidcombustionchambera'bove the fuel.

7 As an article of manufacture, a draftcollar arranged to be connectedwith the combustion-chamber of a stove, heater, or the like, and throughwhich the products of combustion from the combustion-chamber will pass,said draft-collar supporting an injector comprising an air-inlet, aninlet for products of combustion, a mixing and heating chamber, and adischarge for the mixed gases arranged to deliver same into the saidcombustion-chamber above the fuel, said injector having means forregulating and controlling the passage of air therethrough.

8. As an article of manufacture, a draftcollar arranged to be connectedwith the combustion-chamber of a stove, heater, or the like, and throughwhich the products of combustion from the combustion-chamber will pass,said draft-collar supporting an injector arranged diametrically acrossthe same, said injector having an air inlet opening to the atmosphere,an inlet for the products of combustion, provided with anoutwardly-flared mouth opening into the interior of the draftcollar, andfacing toward the combustionchamber, a mixing-chamber, and a dischargeleading the mixed gases back toward the combustion-chamber and arrangedto discharge same into the said combustion-chamber.

WILBUR F. HERRICK.

